<title>标题</title><div class="layui-card layadmin-header">  <div class="layui-breadcrumb" lay-filter="breadcrumb">    <a lay-href="">主页</a>    <a><cite>组件</cite></a>    <a><cite>XXX</cite></a>  </div></div><style>  /* 这段样式只是用于演示 */</style><div class="layui-fluid">  <div class="layui-row layui-col-space15">    <div class="layui-col-md12">      <div class="layui-card">        <div class="layui-card-header">YYY</div>        <div class="layui-card-body">        </div>      </div>    </div>    <div class="layui-col-md12">      <div class="layui-card">        <div class="layui-card-header">ZZZ</div>        <div class="layui-card-body">        </div>      </div>    </div>  </div></div><script>  layui.use(['admin'], function(){    var $ = layui.$            ,admin = layui.admin            ,element = layui.element            ,router = layui.router();  });</script>